Contestability and the Indeterminacy of Free-Entry Equilibria

A general notion of market perfect contestability is introduced. It coincides with the definition given by Baumol et al . under Bertrand competition, but is compatible with Cournot competition as well as monopolistic competition. Using this notion, we illustrate the fact that the number of active firms in free-entry equilibrium may be largely indeterminate and different levels of positive profits may in many cases be sustained. This is shown to be true, in spite of market perfect contestability, under either Cournot competition or product differentiation. Examples are given for both cases. Appropriate conditions of increasing returns are required.
JEL Classification Numbers: D5, D43.     

An empirical model of a household's choice of activities

This paper analyses how households of school-age children choose to participate in the labour force, volunteer work, democratic assemblies, and child-related leisure activities. Contrary to previous studies, the model presented in this paper treats all of these household's choice of activities involving time allocation decisions as simultaneously determined. The empirical section uses qualitative data estimation techniques which permit a wide range of joint and interaction effects among the variables of the model. The results confirm the importance of time-opportunity cost variables as major determinants of household's choice of activities with the mother's education consituting a particularly important factor.     

A heuristic programming approach to the employee scheduling problem and some thoughts on “managerial robots”

We describe a system for the automatic scheduling of employees in the particular setting in which: the number of employees wanted on duty throughout the week fluctuates; the availabilities of the employees varies and changes from week to week; and a new schedule must be produced each week, by virtue of the changing demand for service.The problem which we address appears in a variety of settings, including: airline reservation offices; telephone offices; supermarkets; fast food restaurants; banks and hotels.Previous approaches to the problem have relied chiefly on formal methods, generally involving one or another variation of linear or integer, mathematical programming. We suggest that except in cases involving very small problems (only a handful of employees) that those approaches have not proven promising, especially where union rules and management requirements impose complex constraints on the problem, and that a heuristic approach has proven to be substantially superior.We set forth the general features of our heuristic approach, which we see as an application of artificial intelligence; we show how, in contrast to other approaches, which design shifts as if employees were always available and try to fit those shifts to employees who are not always available, our system design shifts with deference to the employees' limited availabilities; we suggest that, for a given service level, our system produces schedules with a better “fit”—number of employees actually on duty comparing more favorably with the number wanted; and we state that while, for a given service level, a ‘manual scheduler’ may take up to 8 hours each week to prepare a good schedule, our system, on most micro computers, routinely produces better schedules involving up to 100 employees in about 20 minutes.The scheduling of employees is generally considered to be a managerial function, in the setting of the problem we address. When a craft employee is replaced on an assembly line by a machine which performs the same function, we speak of the replacing mechanism as an industrial robot.We suggest that systems like that which we describe deserve a name, to distinguish them from comparable, computer based systems which do not replace, but rather supplement a manager, and we suggest the name ‘managerial robot’ for such systems.We set forth the characteristics which we feel would justify applying the term ‘managerial robot’ to a computer based system, and suggest that classification is basic to understanding and communication and that just as terms such as decision support systems and expert systems prove useful in our increasingly advanced, technological society, so also the term managerial robot has a place in our scheme of things.Decision support systems do not qualify as managerial robots for the reason that managerial robots don't simply support the decision making process, but rather replace the manager in his performance of a function which, when performed by a human being, is considered a managerial function.Nor do we consider managerial robots to qualify as expert systems. While our scheduling system contains an inference mechanism, and could be enhanced to improve the quality of its schedules thru ‘experience’ (and thus to ‘learn’?), that—lacking a knowledge base in the sense of expert systems-and most of all in replacing rather than supporting the decision maker, the managerial robot needs a term of its own.We elaborate, in this paper, a specific application of our system, and show how the design of shifts, and the placement of breaks, serve to yield a fit whose quality no human scheduler can duplicate.     

Factors affecting the stock price performance of share issued privatizations

Shareholders in many share issued privatizations (SIPs) have enjoyed substantial increases in the value of their investments. This study examines the factors that influence the long-run stock price performance of an international sample of SIPs, focusing on three-year buy and hold returns. After controlling for market-wide changes in stock prices, one finds that the relative size of the company has a negative effect on stock price performance, retained government ownership has a positive effect, the presence of a golden share has a negative effect, initial underpricing has a positive effect, and the timing of the privatization has no effect. Performance also depends on the industry and home country.     

From an aggregate to a brand network: a study of the brand portfolio at L'Oréal

Abstract

Our purpose is to contribute to the understanding of brand-portfolio management by examining the brand-portfolio strategies of a world-leading company. We started to work on a case study with L'Oréal. Our research focused on two questions: (1) what reasons lead L'Oréal to develop a brand-portfolio strategy?; (2) how can brand-portfolio management create a higher and stronger level of competitive advantage for this company? The results show that an aggregation of brands is not in itself a brand portfolio. The juxtaposition of brands is one of, but not the sole, element necessary for the development of a brand portfolio, which is a combination of a brand ensemble and key competences born out of organisational savoir-faire. By analysing the evolution of the L'Oréal brand portfolio, this work shows how the brand combination within a portfolio is a key factor for company development, growth, and risk management. It is a crucial phase to understand L'Oréal's competitive advantage.     

When more is not better: Complementarities,costs and contingencies in stakeholder management

Instrumental stakeholder theory has largely emphasized the positive effects of investing in stakeholder cooperative relationships in an additive, linear fashion in the sense that the more investments the better. Yet investing in stakeholders can be very costly and the effects of these investments in firm performance are subject to complex internal complementarities and external contingencies. In this article we rely on set‐theoretic methods and a large international dataset of 1,060 multinational companies to explore theoretically and empirically some of the complementarities, costs and contingencies likely to arise in stakeholder management. Copyright © 2014 John Wiley & Sons, Ltd.     

A South-South perspective on emerging economy companies and institutional coevolution: An empirical study of Chinese multinationals in Africa

In this paper, we show how international tenders act as defining moments in building asymmetric coevolution-based mechanisms between Chinese multinational enterprises and local institutions in developing African countries. We used a case study methodology to explore how three Chinese multinationals – Citic, Sinopec, and Chinalco – developed non-market relations with the institutions of three African countries, namely, Algeria, Gabon and the Republic of Guinea, both during and after the submission of international tenders, to win strategic contracts and securely embed the company in question within the target host country. We found that Chinese companies not only submit tenders, but also develop multiple kinds of alliances in order to influence local institutions over the long term, transplant new business practices and standards, and expand in an unparalleled way, with host-country institutions and Chinese MNEs acting as partners in the new ecosystem. Based on our findings, we propose a model which highlights the specific mechanisms through which successful coevolution processes emerge and prosper between Chinese multinationals and developing country institutions. This study contributes to the international management literature by extending the field of institutional theory to co-evolutionism in international business.